Downsized 4.0 TFSI for Audi S8 cuts fuel consumption 23% compared to predecessor; cylinder deactivation and start-stop
Green Car Congress
OCTOBER 11, 2011
Audi’s principle of downsizing: “ Forced induction replaces displacement ” One twin-scroll turbocharger per cylinder bank compresses the fresh air. The thermal management system uses a ball valve to disconnect the water pump during the engine warm-up phase. At around 100 km/h (62.14 TFSI by more than 10%.
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